A data-driven method calibrates relative CMB polarization angles via cross-correlations without assuming zero isotropic birefringence or primordial EB, forecasting 0.10° and 0.17° uncertainties for SO LAT and Planck at 145 GHz if SO SATs reach 0.08°.
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A new map-based hybrid E-B ILC estimator disentangles cosmic birefringence from miscalibration effects and measures β ≈ 0.32° ± 0.12° on Planck PR4 data.
Bayesian analysis of ACT DR6 CMB polarization data measures cosmic birefringence angle β = 0.215° ± 0.074° excluding zero at 2.9σ, consistent with prior WMAP and Planck results but limited by unexplained systematics.
citing papers explorer
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Calibration of CMB Polarisation Using Cross-Experiment Correlations
A data-driven method calibrates relative CMB polarization angles via cross-correlations without assuming zero isotropic birefringence or primordial EB, forecasting 0.10° and 0.17° uncertainties for SO LAT and Planck at 145 GHz if SO SATs reach 0.08°.
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Field-level constraints on cosmic birefringence with a hybrid $E$-$B$ internal linear combination
A new map-based hybrid E-B ILC estimator disentangles cosmic birefringence from miscalibration effects and measures β ≈ 0.32° ± 0.12° on Planck PR4 data.
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Cosmic Birefringence from the Atacama Cosmology Telescope Data Release 6
Bayesian analysis of ACT DR6 CMB polarization data measures cosmic birefringence angle β = 0.215° ± 0.074° excluding zero at 2.9σ, consistent with prior WMAP and Planck results but limited by unexplained systematics.